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BUG: KASAN: stack-out-of-bounds in instrument_atomic_read include/linux/instrumented.h:68 [inline]
BUG: KASAN: stack-out-of-bounds in atomic_read include/linux/atomic/atomic-instrumented.h:32 [inline]
BUG: KASAN: stack-out-of-bounds in xfs_buf_lock+0x9e/0x520 fs/xfs/xfs_buf.c:1194
Read of size 4 at addr ffffc9000400fb9c by task kswapd0/111

CPU: 1 PID: 111 Comm: kswapd0 Not tainted 6.10.0-rc4-syzkaller-00283-g563a50672d8a #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:114
 print_address_description mm/kasan/report.c:377 [inline]
 print_report+0xc3/0x620 mm/kasan/report.c:488
 kasan_report+0xd9/0x110 mm/kasan/report.c:601
 check_region_inline mm/kasan/generic.c:183 [inline]
 kasan_check_range+0xef/0x1a0 mm/kasan/generic.c:189
 instrument_atomic_read include/linux/instrumented.h:68 [inline]
 atomic_read include/linux/atomic/atomic-instrumented.h:32 [inline]
 xfs_buf_lock+0x9e/0x520 fs/xfs/xfs_buf.c:1194
 xfs_buf_delwri_submit_buffers+0x140/0xa40 fs/xfs/xfs_buf.c:2293
 xfs_buf_delwri_submit+0x8a/0x270 fs/xfs/xfs_buf.c:2371
 xfs_qm_shrink_scan+0x209/0x3f0 fs/xfs/xfs_qm.c:522
 do_shrink_slab+0x44f/0x11c0 mm/shrinker.c:435
 shrink_slab+0x18a/0x1310 mm/shrinker.c:662
 shrink_one+0x493/0x7c0 mm/vmscan.c:4790
 shrink_many mm/vmscan.c:4851 [inline]
 lru_gen_shrink_node+0x89f/0x1750 mm/vmscan.c:4951
 shrink_node mm/vmscan.c:5910 [inline]
 kswapd_shrink_node mm/vmscan.c:6720 [inline]
 balance_pgdat+0x1105/0x1970 mm/vmscan.c:6911
 kswapd+0x5ea/0xbf0 mm/vmscan.c:7180
 kthread+0x2c1/0x3a0 kernel/kthread.c:389
 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>

The buggy address belongs to the virtual mapping at
 [ffffc90004008000, ffffc90004011000) created by:
 kernel_clone+0xfd/0x980 kernel/fork.c:2797

The buggy address belongs to the physical page:
page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xe7e pfn:0x27276
memcg:ffff888028f3f082
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000000 0000000000000000 dead000000000122 0000000000000000
raw: 0000000000000e7e 0000000000000000 00000001ffffffff ffff888028f3f082
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 0, migratetype Unmovable, gfp_mask 0x102dc2(GFP_HIGHUSER|__GFP_NOWARN|__GFP_ZERO), pid 2, tgid 2 (kthreadd), ts 127068304850, free_ts 125519352751
 set_page_owner include/linux/page_owner.h:32 [inline]
 post_alloc_hook+0x2d1/0x350 mm/page_alloc.c:1468
 prep_new_page mm/page_alloc.c:1476 [inline]
 get_page_from_freelist+0x136a/0x2e50 mm/page_alloc.c:3420
 __alloc_pages_noprof+0x22b/0x2460 mm/page_alloc.c:4678
 alloc_pages_mpol_noprof+0x275/0x610 mm/mempolicy.c:2265
 vm_area_alloc_pages mm/vmalloc.c:3566 [inline]
 __vmalloc_area_node mm/vmalloc.c:3642 [inline]
 __vmalloc_node_range_noprof+0xa6a/0x1520 mm/vmalloc.c:3823
 alloc_thread_stack_node kernel/fork.c:309 [inline]
 dup_task_struct kernel/fork.c:1115 [inline]
 copy_process+0x29f5/0x6f50 kernel/fork.c:2220
 kernel_clone+0xfd/0x980 kernel/fork.c:2797
 kernel_thread+0xc0/0x100 kernel/fork.c:2859
 create_kthread kernel/kthread.c:412 [inline]
 kthreadd+0x4ef/0x7d0 kernel/kthread.c:765
 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
page last free pid 5198 tgid 5198 stack trace:
 reset_page_owner include/linux/page_owner.h:25 [inline]
 free_pages_prepare mm/page_alloc.c:1088 [inline]
 free_unref_page+0x64a/0xe40 mm/page_alloc.c:2583
 skb_free_frag include/linux/skbuff.h:3354 [inline]
 skb_free_head+0xa0/0x1d0 net/core/skbuff.c:1079
 skb_release_data+0x75c/0x980 net/core/skbuff.c:1108
 skb_release_all net/core/skbuff.c:1173 [inline]
 __kfree_skb+0x4f/0x70 net/core/skbuff.c:1187
 tcp_rcv_established+0xda9/0x21b0 net/ipv4/tcp_input.c:6087
 tcp_v4_do_rcv+0x707/0xab0 net/ipv4/tcp_ipv4.c:1909
 sk_backlog_rcv include/net/sock.h:1106 [inline]
 __release_sock+0x31b/0x400 net/core/sock.c:2983
 release_sock+0x5a/0x220 net/core/sock.c:3549
 tcp_sendmsg+0x38/0x50 net/ipv4/tcp.c:1352
 inet_sendmsg+0xb9/0x140 net/ipv4/af_inet.c:853
 sock_sendmsg_nosec net/socket.c:730 [inline]
 __sock_sendmsg net/socket.c:745 [inline]
 sock_write_iter+0x4b8/0x5c0 net/socket.c:1160
 new_sync_write fs/read_write.c:497 [inline]
 vfs_write+0x6b6/0x1140 fs/read_write.c:590
 ksys_write+0x1f8/0x260 fs/read_write.c:643
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Memory state around the buggy address:
 ffffc9000400fa80: 00 f3 f3 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffffc9000400fb00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffffc9000400fb80: 00 f1 f1 f1 f1 04 f2 04 f2 00 f3 f3 f3 00 00 00
                            ^
 ffffc9000400fc00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffffc9000400fc80: 00 00 00 00 00 00 f1 f1 f1 f1 f1 f1 04 f2 04 f3
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